Javascript Array find(fn)

Array.prototype.find = function(fn) {

 for ( var i = 0; i < this.length; i++ ) {

  if ( fn(this[i]) === true ) {

   return this[i];

  }/*from w w w . j a v  a 2  s .  c  o m*/

 }

  return undefined;

};

Array.prototype.find = function(fn) {
  for (var i = 0; i < this.length; i++) {
    if(fn(this[i])){
      return this[i];
    }//from   www .j  a v a2  s.  c om
  }
  return undefined;
}